power: smb349-charger: Fix boot-up charger detection logic

If APSD (automatic power source detection) is enabled, use it for
for charger detection at boot-up.

While at it, fix the charger type reporting API.

Change-Id: I9857cffdc065771bd399c6592303f1738876625c
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>